March Madness is in full swing with a plethora of conference tournament upsets and underdogs punching their ticket to the 2018 NCAA Tournament.

The Villanova Wildcats are favored to win the national championship for the second time in three seasons, according to the most recent odds released by BetOnline.ag.

Last season's NCAA Tournament winners, the North Carolina Tar Heels, are listed at 12/1 to repeat, while their hated rivals Duke are the Wildacats' biggest competition at 5/1, according to oddsmakers.

Here's a look at the early betting odds to win the 2018 NCAA Tournament.

Odds to win 2018 NCAA Tournament

Villanova 9/2

Duke 5/1

Virginia 6/1

Michigan State 8/1

Michigan 9/1

Kansas 10/1

North Carolina 12/1

Purdue 12/1

Wichita State 14/1

Florida 20/1

West Virginia 20/1

Arizona 20/1

Xavier 20/1

Cincinnati 20/1

Tennessee 20/1

Texas Tech 20/1

Kentucky 25/1

Gonzaga 25/1

Auburn 33/1

Ohio State 33/1

Oklahoma 40/1

Missouri 40/1

Alabama 40/1

Texas A&M 40/1

Saint Mary's 50/1

Rhode Island 50/1

Clemson 50/1

Penn State 50/1

UCLA 66/1

Baylor 66/1

Seton Hall 66/1

TCU 66/1

Texas 66/1

Arizona State 66/1

Florida State 80/1

USC 80/1

Arkansas 80/1

Virginia Tech 80/1

Creighton 80/1

North Carolina State 80/1

Louisville 100/1

Notre Dame 100/1

Miami, Fla. 100/1

Nevada 100/1

Loyola-Chicago 100/1

Houston 100/1

Syracuse 100/1

Oklahoma State 100/1

Washington 100/1

Butler 125/1

Middle Tennessee 125/1

Mississippi State 125/1

St. John's 150/1

Indiana 200/1

Memphis 200/1

Providence 200/1

Georgia 200/1

Kansas State 200/1

New Mexico State 250/1

Vermont 250/1

East Tennessee State 250/1

Louisiana 250/1

Harvard 500/1

Boise State 500/1

Florida Gulf Coast 500/1

Charleston 500/1

Rider 500/1

Buffalo 500/1

South Dakota State 500/1

St. Bonaventure 500/1

Montana 1000/1

UNC Asheville 1000/1

UC Santa Barbara 1000/1

Pennsylvania 1000/1

Toledo 1000/1

Belmont 1000/1

Nicholls 1000/1

Winthrop 1000/1

Savannah State 1000/1

Odds as of March 5. This article will be updated throughout March and NCAA Tournament.